may deceive
Regular verb: deceive - deceived- deceived

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may deceive
you may deceive
she may deceive
we may deceive
you may deceive
they may deceive 	I may be deceiving
you may be deceiving
she may be deceiving
we may be deceiving
you may be deceiving
they may be deceiving	I may have deceived
you may have deceived
she may have deceived
we may have deceived
you may have deceived
they may have deceived	I may have been deceiving
you may have been deceiving
she may have been deceiving
we may have been deceiving
you may have been deceiving
they may have been deceiving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't deceive
you mayn't deceive
she mayn't deceive
we mayn't deceive
you mayn't deceive
they mayn't deceive 	I mayn't be deceiving
you mayn't be deceiving
she mayn't be deceiving
we mayn't be deceiving
you mayn't be deceiving
they mayn't be deceiving	I mayn't have deceived
you mayn't have deceived
she mayn't have deceived
we mayn't have deceived
you mayn't have deceived
they mayn't have deceived	I mayn't have been deceiving
you mayn't have been deceiving
she mayn't have been deceiving
we mayn't have been deceiving
you mayn't have been deceiving
they mayn't have been deceiving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I deceive?
may you deceive?
may she deceive?
may we deceive?
may you deceive?
may they deceive? 	may I be deceiving?
may you be deceiving?
may she be deceiving?
may we be deceiving?
may you be deceiving?
may they be deceiving? 	may I have deceived?
may you have deceived?
may she have deceived?
may we have deceived?
may you have deceived?
may they have deceived? 	may I have been deceiving?
may you have been deceiving?
may she have been deceiving?
may we have been deceiving?
may you have been deceiving?
may they have been deceiving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I deceive?
mayn't you deceive?
mayn't she deceive?
mayn't we deceive?
mayn't you deceive?
mayn't they deceive? 	mayn't I be deceiving?
mayn't you be deceiving?
mayn't she be deceiving?
mayn't we be deceiving?
mayn't you be deceiving?
mayn't they be deceiving? 	mayn't I have deceived?
mayn't you have deceived?
mayn't she have deceived?
mayn't we have deceived?
mayn't you have deceived?
mayn't they have deceived? 	mayn't I have been deceiving?
mayn't you have been deceiving?
mayn't she have been deceiving?
mayn't we have been deceiving?
mayn't you have been deceiving?
mayn't they have been deceiving?